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Home >> Mercedes Benz >> 2021 >> CLS450 Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Timing - 257 Chassis >> Testing & Repair >> Remove/Install Camshafts - AR05.20-P-6992MSA

Remove/Install Camshafts - AR05.20-P-6992MSA

Engine 256.9 in model 213, 238, 257, 290 

MODIFICATION NOTES

15.08.2019 Note AH00.00-P-0500-01MNE added. Operation step 4  
15.08.2019 Note AH05.20-P-1000-09SZ added. Operation step 5 and 6  
G14548110Courtesy of MERCEDES-BENZ USA
CAUTION Risk of injury  to skin and eyes due to handling of engine oil. Risk of poisoning  caused by swallowing engine oil Wear protective gloves, protective clothing and safety glasses.
Do not fill engine oil into beverage containers.
AS18.00-Z-0001-01A
Topical note Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
REMOVING Remove     
1 Remove camshaft housing.   AR05.20-P-6997MSA 
2 Remove camshaft positioner of intake camshaft (4). When replacing the intake camshaft (4).  
      AR05.20-P-7206MSA 
3 Remove camshaft positioner of exhaust camshaft (5). When replacing the exhaust camshaft (5). AR05.20-P-7207MSA 
4 Remove cylinder head cover from camshaft housing.   AR01.20-P-5019MSA
  Notes on application of flange sealants to seal major assemblies   AH00.00-P-0500-01MNE
5 Remove exhaust camshaft (5) from camshaft housing lower section (2).
General information on checking camshafts and bearing points of camshafts
  AH05.20-P-1000-09SZ 
6 Remove intake camshaft (4) from camshaft housing lower section (2).
General information on checking camshafts and bearing points of camshafts
  AH05.20-P-1000-09SZ 
INSTALLING Install     
7 Insert exhaust camshaft (5) in camshaft
housing lower section (2).
   
REFER TO CAPACITIES & SPECIFICATIONS Specified engine oils (service) - Overview IMPORTANT Wet camshaft bearing points with engine oil. BB00.40-P-0223-02A
8 Insert end stop (A) into intake camshaft (4). SPECIAL TOOL Assembly tool Fig 1
9 Insert spacer (B) into intake camshaft (4). SPECIAL TOOL Assembly tool Fig 1
10 Press CAMTRONIC element (4a) in specified direction (arrow C) against spacer (B). SPECIAL TOOL Assembly tool Fig 1
11 Insert intake camshaft (4) in camshaft housing lower section (2).    
REFER TO CAPACITIES & SPECIFICATIONS Specified engine oils (service) - Overview IMPORTANT Wet camshaft bearing points with engine oil.
IMPORTANT Ensure that the CAMTRONIC element (4a is not twisted during insertion (arrow D).
BB00.40-P-0223-02A
12 Remove spacer (B) and end stop (A). SPECIAL TOOL Assembly tool Fig 1
13 Install cylinder head cover on camshaft housing.   AR01.20-P-5019MSA
14 Install camshaft positioner of exhaust camshaft (5). When replacing the exhaust camshaft (5).  
      AR05.20-P-7207MSA 
15 Install camshaft positioner of intake camshaft (4). When replacing the intake camshaft (4).  
      AR05.20-P-7206MSA 
16 Install camshaft housing.   AR05.20-P-6997MSA 
Fig 1: Identifying Assembly Tool (256 589 03 31 00)
G13744028Courtesy of MERCEDES-BENZ USA